Xenophon tells us, that the Assyrians were fain to keep their horses fettered in the stable, they were so fierce and vicious; and that it required so much time to loose and harness them, that to avoid any disorder this tedious preparation might bring upon them in case of surprise, they never sat down in their camp till it was first well fortified with ditches and ramparts. His Cyrus, who was so great a master in all manner of horse service, kept his horses to their due work, and never suffered them to have anything to eat till first they had earned it by the sweat of some kind of exercise. The Scythians when in the field and in scarcity of provisions used to let their horses blood, which they drank, and sustained themselves by that diet: